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单项选择题
Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium, sodium, and＿.
Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium, sodium, and＿.
A.copper
B.carbon
C.hydrogen
D.sulfur
A.
A.copper
B.carbon
C.hydrogen
D.sulfur
A.copper
B.carbon
C.hydrogen
D.sulfur
